JPS58536Y2 - Ink and water supply equipment in printing presses - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ink/water supply device in a printing press that supplies ink or water on a source roller to a plate on a plate cylinder.

In various printing presses, the ink or water in the vase is supplied to the plate on the plate cylinder through a large number of roller groups. A calling roller device is widely known as a device that supplies water to a swinging roller.

Fig. 1 shows an overview of a conventional ink supply device using a feeding roller device. Inside the ink fountain 1, a source roller 2 that rotates at a low speed is provided, and outside the ink fountain 1, a high speed A swinging roller 3 is provided which rotates at the same time and also swings in the axial direction.

Furthermore, a calling roller 6 held by a roller arm 5 that swings by rotation of a cam 4 is provided between these two rollers 2 and 3.

The calling roller 6 reciprocates between the two rollers 2 and 3 by the swinging of the roller arm 5, and by alternately contacting these rollers, the ink on the original roller 2 is supplied to the swinging roller 3. being done.

However, in this kind of conventional ink supply device, there is a large circumferential speed difference between the original roller 2 and the swinging roller 3, so the calling roller 6 separates from the original roller 2 and comes into contact with the swinging roller 3. When the roller 3 moves away from the swinging roller 3 and comes into contact with the original roller 2, the roller receives a large impact force due to a sudden change in circumferential speed.

This impact causes uneven rotation of the swing roller 3, which is mechanically connected to the swing roller 3, not only when it contacts the swing roller 3 but also when it contacts the original roller 2. (not shown), causing printing problems.

Further, as mentioned above, the calling roller 6 is reciprocated between the original roller 2 and the swinging roller 3 by the cam 4;
Since the outer diameter of the cam 4 changes due to wear due to repeated impact, the cam 4 must work harder each time or it will no longer come into contact with the rollers 2 and 3.

For this reason, in the past, as shown in FIG. 2, the cam lift of the cam 4 was set aside in advance by an amount a.

That is, when the guide 70-ra 6 is not worn out and has a large outer diameter, the cam follower 7 moves forward by floating above the cam surface by a distance a, and comes into contact with the cam surface from the middle of the inclined surface.

Therefore, the restriction of the rotation of the pick-up row 6 toward the original roller 2 depends on the contact with both rollers 2 and 6, and as a result, the pick-up roller 6 exerts an unnecessarily large force on the original roller 6. This contact caused by pressure accelerated the wear of the roller 6, and gave a shock to the original roller 2, which was broken.

Furthermore, since the cam surface and the cam follower are not always in contact with each other, there is a problem in that an impact occurs between the cam surface and the cam follower.

Therefore, as a device for alleviating the impact of the above-mentioned calling roller 6 on the swinging roller 3, a non-driving roller separated from the drive device is interposed between the calling roller 6 and the swinging roller 3. A feeding device has been proposed in which the impact is alleviated by the sliding of the roller, but the contact pressure adjustment between the calling roller 6 and the non-driving roller and the contact pressure between the non-driving roller and the swinging roller are adjusted respectively. Since they cannot be adjusted independently, there is a problem in that when one adjustment is made, the contact pressure on the other side changes accordingly, making it difficult to make accurate adjustments.

The present invention was developed in view of the above points, and a non-drive roller that rotates in contact with the swing roller is supported on an eccentric shaft support of an eccentric bearing that is supported by a roller arm coaxial with the swing roller. In addition, by providing a calling roller that reciprocates between this non-driving roller and the original roller by the swinging of the swinging arm, the contact pressure between each roller can be adjusted without changing the contact pressure between other rollers. By having the rollers act independently, appropriate contact pressure is always maintained between each roller to prevent uneven rotation of the rollers, and the impact between the rollers caused by the difference in circumferential speed of the rollers is alleviated, which can cause printing failures. This system relates to an ink/water supply device in a printing press configured to prevent such problems.

Hereinafter, the configuration and the like will be explained in detail with reference to the embodiments shown in the drawings.

This embodiment shows an example in which the ink/water supply device according to the present invention is implemented in an ink supply device of a printing press, and FIG. 3 is a side view showing an outline thereof, FIG. 4 is a side view, and FIG. 5 is a roller It is a front view developed according to the arrangement.

In these figures, the -f pot 11 is formed into a generally triangular cross section by a side plate 11a, a bottom adjustment plate 11b, and a roller bearing lie, and the roller bearing 11c is connected to the machine drive device. A rotating original roller 12 is supported on a shaft.

13 is a handle for opening and closing the adjustment plate 11b; 14 is an adjustment screw provided in the axial direction of the original roller 12 to adjust the gap between the original roller 12 and the adjustment plate, that is, the amount of ink supplied; The ink is attached to the surface of the original roller 12 in this gap.

A swinging roller 15 connected to the same drive system as the original roller 12 is provided diagonally below the downstream side of the original roller 12 and is rotatably supported by a bearing 17 mounted on a frame 16.

Further, a roller arm 18 is rotatably supported on the outer circumferential portion of the bearing 17, and the rotation of the roller arm 180 is perpendicular to the bearing portion (in Fig. 5, due to the development of the drawing, the direction of the linear force). This is done by adjusting a nut 20 to advance or retreat a threaded rod 19 provided at the tip of a member protruding from the top.

Furthermore, an eccentric bearing 21 is provided at the free end of the roller arm 18.
This eccentric bearing 21 has a kneading roller 22 as a so-called non-driving roller that is separated from the driving device.
is rotatably supported.

In this eccentric bearing 21, the axis of the shaft support that pivotally supports the kneading roller 22 and the axis of the part that is pivotally supported by the roller arm 18 are eccentric as shown by b in the figure. The contact pressure of the kneading roller 22 with respect to the swinging roller 15 is adjusted by adjusting the rotation by an adjustment mechanism (not shown).

Original roller 12 and kneading roller 22 arranged as above
A calling roller 24 rotatably supported on the swing arm 23 is disposed between the swing arm 23 and the swing arm 23.

The cam follower 27 at the tip of the cam lever 26 fixed on the support shaft 25 of the swing arm 23 is in contact with the cam surface of the cam 28, and as the cam 28 rotates, the swing arm 23 swings, and the calling roller 24 It reciprocates between the original roller 12 and the kneading roller 22.

That is, when the cam follower 2T is in contact with the large diameter portion of the cam 28, the calling roller 24 is in contact with the kneading roller 2.
The cam follower 27 is pressed against the cam 28 side, and the swing arm 23 is biased by the compression coil spring 29 with a rotational force toward the original roller 12 side.
When the calling roller 24 is in contact with the cam bottom of the
is pressed against the original roller 12.

30 is an adjustment bolt for adjusting the parallelism of the calling roller 24.

Furthermore, another roller arm 31 which is substantially symmetrical to and parallel to the roller arm 18 is rotatably supported on the outer circumference of the bearing 17, and is supported at its free end. A kneading roller 33, which is a non-driving roller, is rotatably supported on the eccentric shaft support of the eccentric bearing 32.

The contact pressure of the kneading roller 33 with respect to the swinging roller 15 is adjusted by adjusting the rotation of the eccentric bearing 32 by an adjustment mechanism (not shown).

Further, on the downstream side of the kneading roller 33, another swinging roller 34 is provided, and between this swinging roller 34 and the kneading roller 33, a kneading roller is formed whose movement can be adjusted freely by an eccentric bearing 35. 36 are provided.

By adjusting the swinging of the roller arm 31 or rotating the eccentric bearing 32.35, the contact pressure between the swinging roller 15, kneading roller 33, 36, and swinging roller 34 can be adjusted. ing.

Furthermore, the ink on the swinging roller 34 is transferred to the roller arm 37.
．． The printing material is supplied to a plate cylinder (not shown) through a large number of roller groups including a roller supported by a roller 38.

In the ink supply device configured as described above, after the ink in the ink fountain 11 is deposited on the original roller 12,
It is attached to the calling roller 24 that is in contact with this.

Then, by the reciprocating motion of the calling roller 24, the kneading roller 2
2, and is further moved to the swinging roller 15 and the kneading roller 33'.
36, a swinging roller 34, and a large number of roller groups to be supplied to the plate cylinder.

In this ink supply process, it is necessary to accurately set the contact pressure between each roller.
The contact pressure between the swing roller 15 and the swing roller 15 is adjusted by rotating the eccentric bearing 21.

Further, the contact pressure between the pick-up roller 24 and the original roller 12 is adjusted by adjusting the compression coil spring 29, and the contact pressure between the pick-up roller 24 and the kneading roller 22 is adjusted by adjusting the threaded rod 19 and the nut 20. Adjust by rotating.

In this invention, each roller 12, 24, 2
Since the contact pressure between the rollers 2 and 15 is adjusted independently, adjustment is easy, and even if the contact pressure between the feeding roller 24 and the kneading roller 22 is adjusted, the kneading roller 24 and the kneading roller 22 are The contact pressure between the roller 22 and the swinging roller 15 does not change, and the contact pressure between the rollers can be adjusted very accurately.

After adjusting the contact pressure between each roller in this way, the printing operation is started and ink is supplied, but as described above, the original roller 12, the swing roller 15, and the kneading roller 22 that rotates in opposition thereto. Since there is a large difference in rotational speed between the two rollers, when the calling roller 24, which is rotating at a low speed in contact with the original roller 12, comes into contact with the kneading roller 22, which is rotating at a high speed, the circumferential speed undergoes a sudden change.

However, in the present invention, since the kneading roller 22 is a non-driven roller and is configured to slide on the swinging roller 15, the impact force caused by this sudden change in peripheral speed is absorbed by this sliding and the printing plate is It is not transmitted to any rollers of the cylinder or its drive system.

If the housing roller 24 is worn out, the roller arm 18 can be rotated in the same manner as described above to remove the kneading roller 24 and the kneading roller 24 without affecting the contact pressure between the kneading roller 22 and the swinging roller 15. The contact pressure with the roller 22 can be adjusted.

In this way, even if the calling roller 24 is worn out and its diameter changes, the original roller 12 and the kneading roller 2 can be easily adjusted.
2 can be adjusted, there is no need to provide a margin for the cam lift of the cam 28 to allow for wear of the conventional throat and call roller 24.

Figure 6 shows the -ψ angle of the cam surface of this cam 28.
In this cam 28, the calling roller 24 is connected to the original roller 12.
The cam follower 27 reaches point A without floating from the cam surface even while in contact with the cam surface.

Then, while the cam follower 27 reaches point B, the calling roller 24 lightly contacts the kneading roller 22, and by waiting at this position for a while, the calling roller 24 approaches the peripheral speed of the kneading roller 22, and then the cam follower 27
reaches the zero point to obtain a normal contact pressure.

In this way, the cam 28 can have an ideal shape without impact.

In this embodiment, the supply device according to the present invention was implemented in an ink supply device of a printing press, but it could also be implemented in a water supply device of an offset printing press, etc., with exactly the same structure. can do.

As is clear from the above explanation, according to the present invention, the ink/water supply device of the printing press is buttoned, and the swing roller is attached to the eccentric shaft support of the eccentric bearing supported by the roller arm coaxially with the swing roller. The contact pressure between each roller can be adjusted by pivotally supporting a non-driving roller that rotates in contact with the roller, and by providing a calling roller that reciprocates between this non-driving roller and the original roller by the swinging of a swinging arm. Since this is done independently without changing the contact pressure between other rollers, the contact pressure between each roller can always be maintained appropriately by easy adjustment, regardless of roller wear etc. , it is possible to prevent printing failures due to uneven rotation of the rollers, etc.

In addition, this eliminates the need for a cam lift of the cam that reciprocates the calling roller to take into account roller wear, so the cam has an ideal shape and reduces the impact between the original roller and the calling roller. At the same time, the impact caused by the difference in circumferential speed of the rollers is completely absorbed by the sliding motion between the calling roller and the non-driving roller and is not transmitted to the plate cylinder or other parts, so that the contact pressure can be adjusted appropriately. Combined, it is possible to speed up printing work.

Furthermore, the cam follower is also placed in contact with the cam bottom, and the structure is designed to restrict excessive pressing force of the calling roller against the original roller, which not only suppresses the wear of the calling roller as much as possible, but also allows the cam to Another advantage is that impact between the cam followers can also be prevented.

[Brief explanation of the drawing]

Figures 1 and 2 show the ink and water supply system in a conventional printing press, Figure 1 is a schematic side view thereof, Figure 2 is a developed view of the cam surface, and Figures 3 to 6 are An example of an ink/water supply device in a printing press according to the present invention is shown,
Fig. 3 is a side view showing the outline, Fig. 4 is a side view, and Fig. 5 is a front view developed according to the roller arrangement.
FIG. 6 is a developed view of the cam surface. 12... Original roller, 15... Swing roller, 18... Roller arm, 21...
Eccentric bearing, 22...Kneading roller, 23...
... Swinging arm, 24... Calling roller.

Claims (1)

[Scope of utility model registration request] Original roller 12 button and swing roller 1 connected to drive device
5, a roller arm 18 coaxially mounted on the swing roller 15 so as to be able to freely swing; and a roller arm 18 that is rotatably supported on the free end of the roller arm 18 and is rotatably supported on the free end of the roller arm 18 with respect to the pivot axis. an eccentric bearing 21 having an eccentric shaft support; and a non-driving roller 22 which is rotatably supported by the eccentric shaft support of the eccentric bearing 21 and has its peripheral surface slidably opposed to the swinging roller 15 and rotates separated from the drive device. The original roller 12 is supported by a cam 28 and a cam follower 27 which is pivotally supported by the free end of the swinging arm 23 and also contacts the cam bottom of the cam 28 so that the swinging arm 23 swings a certain amount. - An ink/water supply device in a printing press that includes a calling roller 24 that reciprocates between non-driving rollers 22.